Malicious PDF — malware analysis report

Static analysis result for SHA-256 143785cb4bdbe917…

MALICIOUS

PDF

72.2 KB Created: 2020-11-24 17:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e7642f8947c82aaf9c9e5c9ffbabe6f1 SHA-1: d0b5022e61c869b6212db8942e60b394760f4234 SHA-256: 143785cb4bdbe917b330b963bf7e22b75ab98097c56745c2971c749f6b9cd2e3
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as a phishing trojan and a machine learning classifier with high confidence. It contains an embedded URL that redirects to 'https://traffking.ru/aws?utm_term=whatsapp+messenger+apk+latest+version+free', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, appears to contain text related to software downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/aws?utm_term=whatsapp+messenger+apk+latest+version+free PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85503117-db8c-4907-95a7-3652bc354784/gazelle_exercise_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/149565c0-d18e-4a1e-8ef0-5c257cd9512d/relational_algebra_examples_with_sol.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/compensatory_behavior_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57818d2-0d71-465e-8cd1-86716a4f433d/16054082050.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/pandoc_convert_html_to_in_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea994b33-23ec-4187-8db5-30effdacfcd2/15035616708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd310d1-969c-4dd6-a2fa-bc06da8aa524/tilaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76085e5e-cefa-421e-9805-7cb0062b12f2/32455899021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1adf9e21-e0d1-46df-991c-d18ed4102573/alex_ross_the_rest_is_noise.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/76298025014.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/australian_open_2016_winners_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/kaufland_letk_zln.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324cbb57-7dda-4476-bbbb-a6a64c50523c/koxipibolejewezeda.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFB 5452 bytes
SHA-256: 10934fae4f315a3ac806322ffd329f442d9dee5ebd1ec95e6ee23586bf768b62
font_01_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 11276 bytes
SHA-256: cedaf8153fbb7c354138801b89baea1d2797308ff5d76b2ec5b9c7570af960de

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